AT72AV020

AT72AV020 is a complete record/playback IC featuring nonvolatile storage for voice and/or data.The chip contains all the active circuitry required for the recording and playback of voice.On-chip components include signal amplifiers,filters,companding DAC,power amplifier,2-megabit of flash memory,precision oscillator as well as a controller which accepts commands from manual keys or via a 2-wire serial interface.

There are some AT72AV020 features as follows.First,it stores voice and data.The second is complete recorder with external microphone and speak.Then is 2-megabit of flash memory directly accessible via 2-wire interface.Next is automatic message management in stand-alone mode.The fifth is mixed mode usage in CPU mode.Besides,it records to and plays from external memory.The last one is low voltage and low power operation: 1.8 V to 3.6 V;10 mA active I_CC current;0.1A standby I_CC current.

What comes next is about the AT72AV020 analog AC characteristics (V_CC=1.8 V to 3.6 V,T_A=0 to 70).The typical f_s (sampling frequency) is 6.4 kHz and the maximum is 8.0 kHz.The maximum BW (bandwidth) is 2.803 kHz at f_s=6.4 kHz and is 3.504 kHz at f_s=8.0 kHz.The minimum f_s/f_s (f_s tolerance) is -5% and the maximum is +5%.The typical R_MIC (MIC input resistance) is 40 k when differential.The typical R_ANAIN (ANAIN input resistance) is 15 k when V_G referenced.The maximum V_IN (input voltage) is 32 mV_PP when differential.The minimum AV (analog gain) is 45 dB and the maximum is 75 dB at automatic/fixed.The minimum A_P (pre-amp gain tolerance) is -1.5 dB and the maximum is +1.5 dB when fixed gain.The maximum V_O (output voltage swing) is 4.8 V_PP when differential.The maximum V_OS (output offset voltage) is 50 mV when silent play.The typical THD (output total harmonic distortion) is 1% and the maximum is 3% @ 1 kHz,V_O=4.5 VPP.The typical R_OUT (output resistance) is 60 when not in PLAY.The minimum Z_L (speaker impedance) is 32 when differential.